Traffic stalled after some time with HA

[stchesmeli]

Hi all,
I have a problem with traffic going through opnsense with HA when both Opnsense are up: any traffic of a large enough size (e.g. download of a 500MB file) is stalled after some transfert: the transfer starts and then freezes. If I switch off the 2nd Opnsense (backup instance) then I have no more problems.
It's a simple transfer between 2 vlans that crosses the opnsense.
Opnsense are in HA, so the gateways of these vlans are IP CARPs. But even if I use the ip of the Opnsense master instead of the CARP, I have the same problem. Probably a misconfiguration somewhere, but I can't put my finger on it.